SwiftUI：MacOS 上的 AppDelegate

Question

我正在将 SwiftUI iOS 应用移植到 macOS。它使用 @UIApplicationDelegateAdaptor 属性包装器绑定 UIApplicationDelegate class。不幸的是，UIApplicationDelegate class 在 macOS 上不可用，所以我想知道如何绑定我的自定义 AppDelegate。

class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil) -> Bool {
    ...
    }
}

struct MyApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        ...
    }
}

Answer 1

对应的 macOS 具有 NS 前缀

import AppKit

class AppDelegate: NSObject, NSApplicationDelegate {

...

@NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

并且 DidFinishLaunching 委托方法具有不同的签名

func applicationDidFinishLaunching(_ aNotification: Notification) [ ...

Answer 2

差不多，不过后来用NS代替了UI。我做的和你做的略有不同：

@main
struct MyApp: App {
    
    // MARK: - Properties
    // Used variables
    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    @Environment(\.openURL) var openURL
    
    var body: some Scene {
        WindowGroup {
            MainControlView()
        }
        .commands {
            FileMenuCommands(listOfContainers: listOfContainers)
        }
    }
}

然后你可以这样写你的应用程序委托：

import AppKit
import SwiftUI

class AppDelegate: NSObject, NSApplicationDelegate {
    // Whatever you want to write here
}

这一切都对我有用。

SwiftUI：MacOS 上的 AppDelegate

SwiftUI: AppDelegate on MacOS

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swiftui